//
//  MainTabBar.swift
//  SinaWeibo
//
//  Created by apple on 15/11/11.
//  Copyright © 2015年 apple. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {
    
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setUpUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
//        fatalError("init(coder:) has not been implemented")
        super.init(coder: aDecoder)
        
        setUpUI()

    }
    private func setUpUI() {
        
        addSubview(composeBtn)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        let w = self.bounds.width / 5
        let h = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        var index: CGFloat = 0
        
        for subView in subviews {
            
            if subView.isKindOfClass(NSClassFromString("UITabBarButton")!){
                subView.frame = CGRectOffset(rect, index * w, 0)
                index += index == 1 ? 2 : 1
                
                
            }
            composeBtn.frame = CGRectOffset(rect, w * 2, 0)
            bringSubviewToFront(composeBtn)
            
        }
        
        
    }
    
      //MARK: 懒加载
    lazy var composeBtn : UIButton = {
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState:UIControlState.Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)

        btn.sizeToFit()
        
        
        return btn
    }()
    
    
}


